The equations determining the rational \(O(\nu ^2)\)  terms of \(q_{44}, \bar{d}_5\)  and \(a_6\)  contain
also local tail contributions, which are finite and just of \(O(\nu ^2)\)  together
with the \(O(\nu ^2)\)  from singular tail terms, which are fully predicted in relation to their \(O(\nu )\) 
contributions, cf. [1]}. This aspect will be also discussed in Section .
